This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | -8 |
| 4 | -48 |
| 5 | 10 |
| 6 | 224 |
| 7 | 80 |
| 8 | -448 |
| 9 | -231 |
| 10 | 40 |
| 11 | -248 |
| 12 | 1408 |
| 13 | 1466 |
| 14 | -2240 |
| 15 | -80 |
| 16 | 1280 |
| 17 | -4766 |
| 18 | -924 |
| 19 | 1944 |
| 20 | -480 |
| 21 | 9600 |
| 22 | 6944 |
| 23 | -2704 |
| 24 | -8704 |
| 25 | -15525 |
| 26 | 5864 |
| 27 | -3984 |
| 28 | -14080 |
| 29 | 25498 |
| 30 | 2240 |
| 31 | 10816 |
| 32 | 33792 |
| 33 | -29760 |
| 34 | -19064 |
| 35 | 800 |
| 36 | 11088 |
| 37 | 1994 |
| 38 | -54432 |
| 39 | -11728 |
| 40 | -4480 |